An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6150-00-200-7644
NSN 5965-00-362-2158
NSN 5835-01-155-0786
NSN 4140-01-520-4491
NSN 5835-00-816-0394
NSN 5990-00-479-9157
NSN 6110-00-165-1528
NSN 5915-00-605-7103
NSN 6220-01-104-1123
NSN 5965-01-447-8165
NSN 5985-00-224-4305
NSN 5965-00-083-8157